Merge pull request #2640 from PHPOffice/CSV-Reader-Dataype-casting-improvements

Csv reader dataype casting improvements

Author: Mark Baker

CHANGELOG.md

@@ -9,13 +9,23 @@ and this project adheres to [Semantic Versioning](https://semver.org).
 
 ### Added
 
-- Implementation of the ISREF() information function
+- Implementation of the ISREF() information function.
+- Added support for reading "formatted" numeric values from Csv files; although default behaviour of reading these values as strings is preserved.
+
+  (i.e a value of "12,345.67" will be read as numeric `1235.67`, not as a string `"12,345.67"`.
+
+  This functionality is locale-aware, using the server's locale settings to identify the thousands and decimal separators.
 
 ### Changed
 
 - Gnumeric Reader now loads number formatting for cells.
 - Gnumeric Reader now correctly identifies selected worksheet.
 - Some Refactoring of the Ods Reader, moving all formula and address translation from Ods to Excel into a separate class to eliminate code duplication and ensure consistency.
+- Make Boolean Conversion in Csv Reader locale-aware when using the String Value Binder.
+
+  This is determined b the Calculation Engine locale setting.
+
+  (i.e. `"Vrai"` wil be converted to a boolean `true` if the Locale is set to `fr`.)
 
 ### Deprecated
 
@@ -27,7 +37,7 @@ and this project adheres to [Semantic Versioning](https://semver.org).
 
 ### Fixed
 
-- Fixed behaviour of XLSX font style vertical align settings
+- Fixed behaviour of XLSX font style vertical align settings.
 - Resolved formula translations to handle separators (row and column) for array functions as well as for function argument separators; and cleanly handle nesting levels.
 
   Note that this method is used when translating Excel functions between en and other locale languages, as well as when converting formulae between different spreadsheet formats (e.g. Ods to Excel).

docs/topics/accessing-cells.md

@@ -37,9 +37,7 @@ $spreadsheet->getActiveSheet()
 ### Creating a new Cell
 
 If you make a call to `getCell()`, and the cell doesn't already exist, then
-PhpSpreadsheet will (by default) create the cell for you. If you don't want
-to create a new cell, then you can pass a second argument of false, and then
-`getCell()` will return a null if the cell doesn't exist.
+PhpSpreadsheet will create that cell for you.
 
 ### BEWARE: Cells assigned to variables as a Detached Reference
 
@@ -532,7 +530,7 @@ types of entered data using a cell's `setValue()` method (the
 Optionally, the default behaviour of PhpSpreadsheet can be modified,
 allowing easier data entry. For example, a
 `\PhpOffice\PhpSpreadsheet\Cell\AdvancedValueBinder` class is available.
-It automatically converts percentages, number in scientific format, and
+It automatically converts percentages, numbers in scientific format, and
 dates entered as strings to the correct format, also setting the cell's
 style information. The following example demonstrates how to set the
 value binder in PhpSpreadsheet:
@@ -577,7 +575,9 @@ $stringValueBinder->setNumericConversion(false)
 \PhpOffice\PhpSpreadsheet\Cell\Cell::setValueBinder( $stringValueBinder );
 ```
 
-**Creating your own value binder is relatively straightforward.** When more specialised
+### Creating your own value binder
+
+Creating your own value binder is relatively straightforward. When more specialised
 value binding is required, you can implement the
 `\PhpOffice\PhpSpreadsheet\Cell\IValueBinder` interface or extend the existing
 `\PhpOffice\PhpSpreadsheet\Cell\DefaultValueBinder` or

docs/topics/reading-files.md

@@ -560,6 +560,44 @@ Xlsx      | NO  | Xls    | NO  | Xml | NO  |
 Ods       | NO  | SYLK   | NO  | Gnumeric     | NO  |
 CSV       | YES | HTML   | NO
 
+
+### Reading formatted Numbers from a CSV File
+
+Unfortunately, numbers in a CSV file may be formatted as strings.
+If that number is a simple integer or float (with a decimal `.` separator) without any thousands separator, then it will be treated as a number.
+However, if the value has a thousands separator (e.g. `12,345`), or a decimal separator that isn't a `.` (e.g. `123,45` for a European locale), then it will be loaded as a string with that formatting.
+If you want the Csv Reader to convert that value to a numeric when it loads the file, the you need to tell it to do so. The `castFormattedNumberToNumeric()` lets you do this.
+
+(Assuming that our server is configured with German locale settings: otherwise it may be necessary to call `setlocale()` before loading the file.)
+```php
+$inputFileType = 'Csv';
+$inputFileName = './sampleData/example1.de.csv';
+
+/** It may be necessary to call setlocale() first if this is not your default locale  */
+// setlocale(LC_ALL, 'de_DE.UTF-8', 'deu_deu');
+
+/**  Create a new Reader of the type defined in $inputFileType  **/
+$reader = \PhpOffice\PhpSpreadsheet\IOFactory::createReader($inputFileType);
+/**  Enable loading numeric values formatted with German , decimal separator and . thousands separator  **/
+$reader->castFormattedNumberToNumeric(true);
+
+/**  Load the file to a Spreadsheet Object  **/
+$spreadsheet = $reader->load($inputFileName);
+```
+This will attempt to load those formatted numeric values as numbers, based on the server's locale settings.
+
+If you want to load those values as numbers, but also to retain the formatting as a number format mask, then you can pass a boolean `true` as a second argument to the `castFormattedNumberToNumeric()` method to tell the Reader to identify the format masking to use for that value. This option does have an arbitrary limit of 6 decimal places.
+
+If your Csv file includes other formats for numbers (currencies, scientific format, etc); then you should probably also use the Advanced Value Binder to handle these cases.  
+
+Applies to:
+
+Reader    | Y/N |Reader  | Y/N |Reader        | Y/N |
+----------|:---:|--------|:---:|--------------|:---:|
+Xlsx      | NO  | Xls    | NO  | Xml | NO  |
+Ods       | NO  | SYLK   | NO  | Gnumeric     | NO  |
+CSV       | YES | HTML   | NO
+
 ### A Brief Word about the Advanced Value Binder
 
 When loading data from a file that contains no formatting information,

src/PhpSpreadsheet/Reader/Csv.php

@@ -2,12 +2,14 @@
 
 namespace PhpOffice\PhpSpreadsheet\Reader;
 
+use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
 use PhpOffice\PhpSpreadsheet\Cell\Cell;
 use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\Reader\Csv\Delimiter;
 use PhpOffice\PhpSpreadsheet\Reader\Exception as ReaderException;
 use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
 use PhpOffice\PhpSpreadsheet\Spreadsheet;
+use PhpOffice\PhpSpreadsheet\Style\NumberFormat;
 
 class Csv extends BaseReader
 {
@@ -91,6 +93,16 @@ class Csv extends BaseReader
      */
     private $testAutodetect = true;
 
+    /**
+     * @var bool
+     */
+    protected $castFormattedNumberToNumeric = false;
+
+    /**
+     * @var bool
+     */
+    protected $preserveNumericFormatting = false;
+
     /**
      * Create a new CSV Reader instance.
      */
@@ -294,6 +306,14 @@ private function setAutoDetect(?string $value): ?string
         return $retVal;
     }
 
+    public function castFormattedNumberToNumeric(
+        bool $castFormattedNumberToNumeric,
+        bool $preserveNumericFormatting = false
+    ): void {
+        $this->castFormattedNumberToNumeric = $castFormattedNumberToNumeric;
+        $this->preserveNumericFormatting = $preserveNumericFormatting;
+    }
+
     /**
      * Loads PhpSpreadsheet from file into PhpSpreadsheet instance.
      */
@@ -330,6 +350,7 @@ public function loadIntoExisting(string $filename, Spreadsheet $spreadsheet): Sp
             $columnLetter = 'A';
             foreach ($rowData as $rowDatum) {
                 $this->convertBoolean($rowDatum, $preserveBooleanString);
+                $numberFormatMask = $this->convertFormattedNumber($rowDatum);
                 if ($rowDatum !== '' && $this->readFilter->readCell($columnLetter, $currentRow)) {
                     if ($this->contiguous) {
                         if ($noOutputYet) {
@@ -339,6 +360,10 @@ public function loadIntoExisting(string $filename, Spreadsheet $spreadsheet): Sp
                     } else {
                         $outRow = $currentRow;
                     }
+                    // Set basic styling for the value (Note that this could be overloaded by styling in a value binder)
+                    $sheet->getCell($columnLetter . $outRow)->getStyle()
+                        ->getNumberFormat()
+                        ->setFormatCode($numberFormatMask);
                     // Set cell value
                     $sheet->getCell($columnLetter . $outRow)->setValue($rowDatum);
                 }
@@ -365,16 +390,49 @@ public function loadIntoExisting(string $filename, Spreadsheet $spreadsheet): Sp
     private function convertBoolean(&$rowDatum, bool $preserveBooleanString): void
     {
         if (is_string($rowDatum) && !$preserveBooleanString) {
-            if (strcasecmp('true', $rowDatum) === 0) {
+            if (strcasecmp(Calculation::getTRUE(), $rowDatum) === 0 || strcasecmp('true', $rowDatum) === 0) {
                 $rowDatum = true;
-            } elseif (strcasecmp('false', $rowDatum) === 0) {
+            } elseif (strcasecmp(Calculation::getFALSE(), $rowDatum) === 0 || strcasecmp('false', $rowDatum) === 0) {
                 $rowDatum = false;
             }
         } elseif ($rowDatum === null) {
             $rowDatum = '';
         }
     }
 
+    /**
+     * Convert numeric strings to int or float values.
+     *
+     * @param mixed $rowDatum
+     */
+    private function convertFormattedNumber(&$rowDatum): string
+    {
+        $numberFormatMask = NumberFormat::FORMAT_GENERAL;
+        if ($this->castFormattedNumberToNumeric === true && is_string($rowDatum)) {
+            $numeric = str_replace(
+                [StringHelper::getThousandsSeparator(), StringHelper::getDecimalSeparator()],
+                ['', '.'],
+                $rowDatum
+            );
+
+            if (is_numeric($numeric)) {
+                $decimalPos = strpos($rowDatum, StringHelper::getDecimalSeparator());
+                if ($this->preserveNumericFormatting === true) {
+                    $numberFormatMask = (strpos($rowDatum, StringHelper::getThousandsSeparator()) !== false)
+                        ? '#,##0' : '0';
+                    if ($decimalPos !== false) {
+                        $decimals = strlen($rowDatum) - $decimalPos - 1;
+                        $numberFormatMask .= '.' . str_repeat('0', min($decimals, 6));
+                    }
+                }
+
+                $rowDatum = ($decimalPos !== false) ? (float) $numeric : (int) $numeric;
+            }
+        }
+
+        return $numberFormatMask;
+    }
+
     public function getDelimiter(): ?string
     {
         return $this->delimiter;

tests/PhpSpreadsheetTests/Reader/Csv/CsvIssue2232Test.php

@@ -2,6 +2,7 @@
 
 namespace PhpOffice\PhpSpreadsheetTests\Reader\Csv;
 
+use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
 use PhpOffice\PhpSpreadsheet\Cell\Cell;
 use PhpOffice\PhpSpreadsheet\Cell\IValueBinder;
 use PhpOffice\PhpSpreadsheet\Cell\StringValueBinder;
@@ -31,7 +32,7 @@ protected function tearDown(): void
      * @param mixed $b2Value
      * @param mixed $b3Value
      */
-    public function testEncodings(bool $useStringBinder, ?bool $preserveBoolString, $b2Value, $b3Value): void
+    public function testBooleanConversions(bool $useStringBinder, ?bool $preserveBoolString, $b2Value, $b3Value): void
     {
         if ($useStringBinder) {
             $binder = new StringValueBinder();
@@ -60,4 +61,41 @@ public function providerIssue2232(): array
             [true, true, 'FaLSe', 'tRUE'],
         ];
     }
+
+    /**
+     * @dataProvider providerIssue2232locale
+     *
+     * @param mixed $b4Value
+     * @param mixed $b5Value
+     */
+    public function testBooleanConversionsLocaleAware(bool $useStringBinder, ?bool $preserveBoolString, $b4Value, $b5Value): void
+    {
+        if ($useStringBinder) {
+            $binder = new StringValueBinder();
+            if (is_bool($preserveBoolString)) {
+                $binder->setBooleanConversion($preserveBoolString);
+            }
+            Cell::setValueBinder($binder);
+        }
+
+        Calculation::getInstance()->setLocale('fr');
+
+        $reader = new Csv();
+        $filename = 'tests/data/Reader/CSV/issue.2232.csv';
+        $spreadsheet = $reader->load($filename);
+        $sheet = $spreadsheet->getActiveSheet();
+        self::assertSame($b4Value, $sheet->getCell('B4')->getValue());
+        self::assertSame($b5Value, $sheet->getCell('B5')->getValue());
+        $spreadsheet->disconnectWorksheets();
+    }
+
+    public function providerIssue2232locale(): array
+    {
+        return [
+            [true, true, 'Faux', 'Vrai'],
+            [true, true, 'Faux', 'Vrai'],
+            [false, false, false, true],
+            [false, false, false, true],
+        ];
+    }
 }